a question for python

Question

Could not find a version that satisfies the requirement attrs>=17.4.0 (from T
isted==18.7.0) (from versions: 15.0.0a1, 15.0.0, 15.1.0, 15.2.0, 16.0.0, 16.1.0
16.2.0, 16.3.0, 17.1.0, 17.2.0)
No matching distribution found for attrs>=17.4.0 (from Twisted==18.7.0)

Answer 1

Looks like twisted needs attrs. Have you installed it?

Answer 2

thanks.I get it. I need to upgrade the attrs